CN101531444B - Sewage recycling process for combination of biological rapid filtration and slow filtration - Google Patents
Sewage recycling process for combination of biological rapid filtration and slow filtration Download PDFInfo
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- CN101531444B CN101531444B CN2009100817488A CN200910081748A CN101531444B CN 101531444 B CN101531444 B CN 101531444B CN 2009100817488 A CN2009100817488 A CN 2009100817488A CN 200910081748 A CN200910081748 A CN 200910081748A CN 101531444 B CN101531444 B CN 101531444B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention relates to a sewage recycling process for combination of biological rapid filtration and slow filtration, belonging to the field of sewage treatment. The process comprises a step of biological rapid filtration and a step of biological slow filtration; inflowing water sequentially enters a biological rapid filter and a biological slow filter; the combination of biological rapid filtration and slow filtration is adopted to remove secondary yielding water residual organism, ammonian, total nitrogen, suspended substance, turbidness, chroma and stink. The sewage processed after biological rapid filtration and biological slow filtration turns qualified recycle water after being sterilized and used as municipal multi-purpose water for greening or flushing. In the invention, slow filtration is introduced to sewage recycling process in combination with the biological rapid filtration, thus giving play to the strength of the two steps and further forming an economical and highly effective sewage recycling process.
Description
Technical field
The present invention relates to a kind of biological rapid filtration and slow filtration sewage recycling process for combination, belong to sewage treatment area, is a kind of technology of advanced treatment of wastewater and reuse.
Background technology
China is the country of water resources shortage, and water pollutes also very serious simultaneously.The water crisis is failed so far effectively to be contained, and the trend of further aggravation is arranged.Reusing sewage has promptly been opened up new water source, can reduce quantity of wastewater effluent again, can play the dual purpose of alleviating shortage of water resources and recovering good water surrounding, and this has been the common recognition of international field of water treatment and water resources circle.
Behind the regeneration effluent, can be used for field irrigation, industrial colling moisturizing, also can be used as cities and towns such as afforestation, road are sprayed, flushed the toilet, carwash and use mixedly.According to the difference of reuse purposes, reuse water must reach corresponding water quality standard.
Current, along with improving constantly of sustainable development of economy and living standards of the people, except to the index requests such as organism traditional in the reuse water, ammonia nitrogen and turbidity, people also have higher requirement to the sense index of reuse water.Stink and color problem as the reuse water of current common concern.
Current traditional sewage recycling process is coagulating sedimentation (clarification)+filtration+sterilization.This technology investment and running cost are lower, and turbidity and suspended substance are had better removal effect, but limited to nutrition class material removal effects such as organism, ammonia nitrogens, and especially colourity and stink almost can not be removed.
For further increasing water quality, senior oxidation technologies such as charcoal absorption, membrane technique and ozone are introduced into the reusing sewage field.The outstanding advantage of this class technology is the part that can be removed underwater micro-organic matter, smells and colourity, but also has shortcoming.Not only consume chemical substance and energy as some advanced oxidation processes, also may generate the stronger intermediate product of some toxicity.Embrane method is the treatment process that has future, but expensive at present price and complicated pretreatment and membrane pollution problem are still unresolved.And the dense water that embrane method produces must further be handled.The removal efficient of absorption method (gac) is very good, and has broad spectrum.The shortcoming of absorption method is that the loading capacity of sorbent material is limited, needs constantly to change.Sorbent material after saturated in addition needs further to handle, otherwise very easily causes secondary pollution.
To sum up, be badly in need of the efficient sewage recycling process of exploitation.
The fast filtering technology of biology such as BAF is applied in the reusing sewage gradually in recent years.Owing to adopted big particle diameter filtrate and thicker filter bed, the Sewage Plant secondary effluent can directly enter BAF without coagulating sedimentation.Owing to strengthened biological action, so BAF can not only remove turbidity, also can effectively remove ammonia nitrogen and conventional organic substance.In the reusing sewage field, BAF has become the substitute of traditional rapid filter gradually.Domestic a lot of newly-designed regeneration water factory has all adopted biological aerated filter process.
Compare with traditional technology,, and simplified the Production Flow Chart of reuse water though BAF has improved reuse water water quality, limited to smelling with the removal effect of colourity.
Slowly filter is an ancient technology, existing more than 200 year history.Slowly filter belongs to a kind of biofiltration mode, can generate one deck adhesive film (schmutzdecke) on the top layer, slow filter of operational excellence.Meetings such as a large amount of bacteriums, fungi, algae even microfauna are grown in the slow filter, and form an intact ecocystem.Rely on these microorganism actings in conjunction, filter slowly organism is had good removal ability, can remove preferably and smell and colourity, the clearance to bacterium and virus can reach more than 90% simultaneously.
Owing to have a big shortcoming of floor space, slow filtering technology is once once by unfrequented and by fast leaching generation.Because to organism, particularly micro-content organism and bacterium, virus have good removal ability, in today of water environment degradation, filter obtains paying attention to again slowly.Slow filtering technology is used widely in the waterworks in current Europe, is considered to remove the effective means of micro substance in the water.All the time, the slow filter also is used to the denitrogenation and the advanced treatment of sewage.
Summary of the invention
To having the As-Is analysis of reusing sewage technology both at home and abroad now, the present invention proposes a kind of new reuse technology, particularly a kind of biological rapid filtration and slow filtration sewage recycling process for combination based on above-mentioned.The present invention will filter slowly and be incorporated in the sewage recycling process, and filter combination soon with biology, respectively get the chief, make it be combined into a kind of sewage recycling process of economical and efficient.
Technical scheme of the present invention is as follows:
The present invention is a kind of biological rapid filtration and slow filtration sewage recycling process for combination, comprise biological fast filter and filter step slowly, it is characterized in that: biological fast filter of this technology utilization and the combination of filter slowly, realize the removal of secondary effluent residual organic substances, ammonia nitrogen, total nitrogen, suspended substance, turbidity, colourity and stink, its concrete steps are as follows: at first, water outlet after the employing sewage second-level is handled is as water inlet, water inlet directly enters biological rapid filter, biological rapid filter has biological action and physical filtering effect simultaneously, in order to remove organism, ammonia nitrogen and the suspended substance in the sewage second-level treat effluent; Then, the water outlet of biological rapid filter enters the slow filter once more, the slow filter relies on the biological action of one deck adhesive film on filtrate top layer further to remove organism, ammonia nitrogen, suspended substance and turbidity material remaining in the biological rapid filter water outlet, simultaneously, utilize the good biofiltration performance in slow filter, remove colourity, stink and bacterium in the water, reach the purpose that improves effluent quality; The process biology is filtered soon and is filtered sewage afterwards slowly at last, becomes qualified reuse water after sterilizing, as afforesting or the municipal miscellaneous water of flushing the toilet.
Described a kind of biological rapid filtration and slow filtration sewage recycling process for combination is characterized in that: adopt activated sludge process or bio membrane process to carry out sewage second-level and handle, and whether the purposes decision of looking reuse water carries out denitrogenation dephosphorizing in sewage second-level is handled.
Described a kind of biological rapid filtration and slow filtration sewage recycling process for combination, it is characterized in that: the biological filter in the described biofiltration step is a conventional rapid filter of having strengthened biological action, biological action wherein relies on following approach to be strengthened: according to the raw water quality situation, the bottom, filter tank is set up aerating apparatus or is carried out preaeration, adjust the filter back washing strategy, reduce back flushing to biomembranous destruction on the filtrate, biological rapid filter water inlet does not add sterilizing agent.
Described a kind of biological rapid filtration and slow filtration sewage recycling process for combination is characterized in that: according to filtrate, filter bed thickness and influent quality situation, the filtering velocity of biological rapid filter is controlled between 0.5～10m/h.
Described a kind of biological rapid filtration and slow filtration sewage recycling process for combination is characterized in that: described biological rapid filter is BAF, bioactivity filter or good air filter pond.
Described a kind of biological rapid filtration and slow filtration sewage recycling process for combination, it is characterized in that: described slow filter has biological action and filteration, and the slow filter does not need back flushing, but need periodically strike-off.
Described a kind of biological rapid filtration and slow filtration sewage recycling process for combination is characterized in that: according to the influent quality situation, the filtering velocity of slow filter is controlled between 0.1～0.5m/h.
Described a kind of biological rapid filtration and slow filtration sewage recycling process for combination is characterized in that: slow filtrate adopts chlorine, ultraviolet ray, dioxide peroxide or ozonation process to carry out disinfection.
Biological rapid filtration and slow filtration sewage recycling process for combination of the present invention is filtered biology soon (BAF) and is filtered slowly and combines, and utilizes biological fast filter to remove the turbidity and the suspended substance of Sewage Plant secondary effluent, and further removes organism and nitrated ammonia nitrogen in the water.Simultaneously for follow-up filter slowly provides the high-quality water inlet, with the obstruction that reduces and avoid filtering slowly.Utilize slow elimination to remove and smell and colourity, and further remove fast filtrate residual organic, ammonia nitrogen, suspended substance and turbidity etc., with this safety that improves the sense organ of reuse water and ensure reuse water.Slowly filter simultaneously and also can alleviate follow-up sterilization load, raising sterilisation effect bacterium and the good removal effect of virus.
Description of drawings
Fig. 1 is the process flow sheet of biological rapid filtration and slow filtration sewage recycling process for combination of the present invention.
Embodiment
As shown in Figure 1, the specific embodiment of the present invention is as follows.
This biological rapid filtration and slow filtration sewage recycling process for combination comprises biological fast filter and filters step slowly, biological fast filter of this technology utilization and the combination of filter slowly, realize the removal of secondary effluent residual organic substances, ammonia nitrogen, total nitrogen, suspended substance, turbidity, colourity and stink, its concrete steps are as follows: at first, water outlet after the employing sewage second-level is handled is as water inlet, water inlet directly enters biological rapid filter, biological rapid filter has biological action and physical filtering effect simultaneously, in order to remove organism, ammonia nitrogen, suspended substance and the turbidity material in the sewage second-level treat effluent; Then, the water outlet of biological rapid filter enters the slow filter once more, the slow filter relies on the biological action of one deck adhesive film on filtrate top layer further to remove organism, ammonia nitrogen and suspended substance remaining in the biological rapid filter water outlet, simultaneously, utilize the good biofiltration performance in slow filter, remove colourity, stink and bacterium in the water, reach the purpose that improves effluent quality; The process biology is filtered soon and is filtered sewage afterwards slowly at last, becomes qualified reuse water after sterilizing, as afforesting or the municipal miscellaneous water of flushing the toilet.
Wherein, the second-stage treatment of sewage can adopt technologies such as activated sludge process, biomembrance process.Whether second-stage treatment needs denitrogenation dephosphorizing to depend on the purposes of reuse water.
Biological filter in the biofiltration step is a conventional rapid filter of having strengthened biological action, biological action wherein relies on following approach to be strengthened: according to the raw water quality situation, the bottom, filter tank is set up aerating apparatus or is carried out preaeration, adjust the filter back washing strategy, reduce back flushing to biomembranous destruction on the filtrate, biological rapid filter water inlet does not add sterilizing agents such as chlorine.According to filtrate, filter bed thickness and influent quality situation, the filtering velocity of biological rapid filter is controlled between 0.5～10m/h.Biological rapid filter can be BAF, bioactivity filter or good gas (aerobic) filter tank.
Slow filter in the above-mentioned biological rapid filtration and slow filtration sewage recycling process for combination has biological action and filteration, and the slow filter does not need back flushing, but need periodically strike-off.According to the influent quality situation, the filtering velocity of slow filter is controlled between 0.1～0.5m/h.
After the slow filter goes out water sterilization, promptly become qualified reuse water.Technology of the present invention does not limit sterilization method.Be to adopt sterilizing agents such as conventional chlorine, ultraviolet, dioxide peroxide, ozone behind the slow filtrate.The dosage of sterilizing agent should be determined by test.
Beneficial effect of the present invention can be verified by following experimental result.
Set up a cover rapid filtration and slow filtration combined system.Utilize plexi-glass tubular analogue biological quick filter tank and the slow filter of two DN100 respectively.The significant parameter in two simulation filter tanks sees Table 1.
Table 1 biological rapid filtration and slow filtration combined system significant parameter
This combination process adopts the water outlet of a cover sanitary sewage second-stage treatment device as water inlet.This sanitary sewage is mainly from a residential quarter.Second-stage treatment adopts common SBR technology, does not consider the removal of nitrogen phosphorus.Secondary effluent at first enters biological rapid filter bottom, and the filtering velocity upward flow with 1m/h passes through filter bed then.For enough oxygen being provided for the microorganism in the filter bed, establish a cover aerating apparatus in biological rapid filter bottom, gas-water ratio is 3: 1.Enter the slow filter again to stream down after the biological rapid filter water outlet, with the 0.1m/h filtering velocity through filter back water outlet slowly.
Combined system has adopted the Starting mode of natural membrane, enters steady operation period afterwards.Table 2 is the combined system water temperature in winter average experimental results in lower (12 ℃-15 ℃) stage.As can be seen from Table 2, the biological rapid filtration and slow filtration combination process has good removal effect to organism (COD), turbidity.Colourity also has preferably to be removed.Though ammonia nitrogen has 52% clearance, final outflow water still has 10.2mg/L.This is that the ammonia nitrogen in the secondary effluent has just reached 20.3mg/L because do not consider the removal of ammonia nitrogen in the second-stage treatment.The another one reason is the low excessively cause of water temperature.Combination process also has good effect of removing to total plate count, and clearance reaches 61%.This can reduce follow-up sterilization load, reduces the dosage of sterilizing agent.In addition, behind the secondary effluent process biological rapid filtration and slow filtration combination process, stink also has the reduction (because the stink detection is subjective, table 2 does not provide data) of certain degree.
Table 2 biological rapid filtration and slow filtration combination process winter is to the removal effect of principal pollutant
Claims (1)
1. biological rapid filtration and slow filtration sewage recycling process for combination, it is characterized in that: comprise biological fast filter and filter step slowly, biological fast filter of this technology utilization and the combination of filter slowly, realize the removal of secondary effluent residual organic substances, ammonia nitrogen, total nitrogen, suspended substance, turbidity, colourity and stink, its concrete steps are as follows: at first, water outlet after the employing sewage second-level is handled is as water inlet, water inlet directly enters biological rapid filter, biological rapid filter has biological action and physical filtering effect simultaneously, in order to remove organism, ammonia nitrogen and the suspended substance in the sewage second-level treat effluent; Then, the water outlet of biological rapid filter enters the slow filter once more, the slow filter relies on the biological action of one deck adhesive film on filtrate top layer further to remove organism, ammonia nitrogen, suspended substance and turbidity material remaining in the biological rapid filter water outlet, simultaneously, utilize the good biofiltration performance in slow filter, remove colourity, stink and bacterium in the water, reach the purpose that improves effluent quality; Sewage is afterwards filtered and filtered slowly to the process biology soon at last, after sterilization, become qualified reuse water, as the greening or the municipal miscellaneous water of flushing the toilet, adopt activated sludge process or bio membrane process to carry out sewage second-level and handle, and whether the purposes decision of looking reuse water carries out denitrogenation dephosphorizing in sewage second-level is handled; Biological filter in the biofiltration step is a conventional rapid filter of having strengthened biological action, biological action wherein relies on following approach to be strengthened: according to the raw water quality situation, the bottom, filter tank is set up aerating apparatus or is carried out preaeration, adjust the filter back washing strategy, reduce back flushing to biomembranous destruction on the filtrate, biological rapid filter water inlet does not add sterilizing agent; According to filtrate, filter bed thickness and influent quality situation, the filtering velocity of biological rapid filter is controlled between 0.5～10m/h; Described biological rapid filter is BAF, bioactivity filter or good air filter pond; Described slow filter has biological action and filteration, and the slow filter does not need back flushing, but need periodically strike-off; According to the influent quality situation, the filtering velocity of slow filter is controlled between 0.1～0.5m/h; Slow filtrate adopts chlorine, ultraviolet ray, dioxide peroxide or ozonation process to carry out disinfection.
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| CN2009100817488A CN101531444B (en) | 2009-04-10 | 2009-04-10 | Sewage recycling process for combination of biological rapid filtration and slow filtration |
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| CN2009100817488A CN101531444B (en) | 2009-04-10 | 2009-04-10 | Sewage recycling process for combination of biological rapid filtration and slow filtration |
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| CN101531444A CN101531444A (en) | 2009-09-16 |
| CN101531444B true CN101531444B (en) | 2011-07-20 |
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| CN104445826B (en) * | 2014-12-15 | 2016-09-14 | 贵州师范大学 | A kind of karst water purification system |
| CN109879426B (en) * | 2019-03-29 | 2023-01-17 | 云南合续环境科技股份有限公司 | Method for deep dephosphorization and denitrification of sewage treatment |
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| CN1958485A (en) * | 2006-11-10 | 2007-05-09 | 哈尔滨北方环保工程有限公司 | Method for regenerating treated wastewater through mass transfer, and utilized by industries |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1587107A (en) * | 2004-09-09 | 2005-03-02 | 同济大学 | Horizontal undercurrent artificial wet land sewage treating process of variable grain size combined filler |
| CN1958485A (en) * | 2006-11-10 | 2007-05-09 | 哈尔滨北方环保工程有限公司 | Method for regenerating treated wastewater through mass transfer, and utilized by industries |
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